### Bug Description If building for multiple platforms using the same architecture, generated artifacts are overwritten by the next platform. ### To Reproduce Create a new project with `snapcraft init`. Edit the project file and declare two platforms with the same build-on/build-for entries, and run `snapcraft pack --verbose`. ### Environment Snapcraft 8.8.1 running in managed mode. ### snapcraft.yaml ```yaml platforms: plat1: build-on: amd64 build-for: amd64 plat2: build-on: amd64 build-for: amd64 ``` ### Relevant log output ```shell Launching managed ubuntu 24.04 instance... Creating instance from base instance Starting instance ... Creating snap package... Packed xx-test_0.1_amd64.snap Launching managed ubuntu 24.04 instance... Creating instance from base instance Starting instance ... Creating snap package... Packed xx-test_0.1_amd64.snap ``` ### Additional context _No response_